The Crawling Burrows Ant EV is typically located in the southern half of Dryfoot over a very large distance. It's strongly suggested that you use a respawn node to see the location by following the purple light indicated when standing near one. It's commonly found near the monolith, by the ledge just inside Dryfoot from Northreach, and the valley that runs east to west towards the Southwest Maurader camp where the Runty quest starts.
Creatures
Confirmed Spawns: Room J